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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2001 Hiroyuki Kondo, Hirokazu Takata, and Hitoshi Yamamoto
* Copyright (C) 2004, 2006 Hirokazu Takata <takata at linux-m32r.org>
*/
#ifndef _ASM_M32R_IRQFLAGS_H
#define _ASM_M32R_IRQFLAGS_H
#include <linux/types.h>
static inline unsigned long arch_local_save_flags(void)
{
unsigned long flags;
asm volatile("mvfc %0,psw" : "=r"(flags));
return flags;
}
static inline void arch_local_irq_disable(void)
{
#if !defined(CONFIG_CHIP_M32102) && !defined(CONFIG_CHIP_M32104)
asm volatile (
"clrpsw #0x40 -> nop"
: : : "memory");
#else
unsigned long tmpreg0, tmpreg1;
asm volatile (
"ld24 %0, #0 ; Use 32-bit insn.
\t"
"mvfc %1, psw ; No interrupt can be accepted here.
\t"
"mvtc %0, psw
\t"
"and3 %0, %1, #0xffbf
\t"
"mvtc %0, psw
\t"
: "=&r" (tmpreg0), "=&r" (tmpreg1)
:
: "cbit", "memory");
#endif
}
static inline void arch_local_irq_enable(void)
{
#if !defined(CONFIG_CHIP_M32102) && !defined(CONFIG_CHIP_M32104)
asm volatile (
"setpsw #0x40 -> nop"
: : : "memory");
#else
unsigned long tmpreg;
asm volatile (
"mvfc %0, psw;
\t"
"or3 %0, %0, #0x0040;
\t"
"mvtc %0, psw;
\t"
: "=&r" (tmpreg)
:
: "cbit", "memory");
#endif
}
static inline unsigned long arch_local_irq_save(void)
{
unsigned long flags;
#if !(defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_M32104))
asm volatile (
"mvfc %0, psw;
\t"
"clrpsw #0x40 -> nop;
\t"
: "=r" (flags)
:
: "memory");
#else
unsigned long tmpreg;
asm volatile (
"ld24 %1, #0
\t"
"mvfc %0, psw
\t"
"mvtc %1, psw
\t"
"and3 %1, %0, #0xffbf
\t"
"mvtc %1, psw
\t"
: "=r" (flags), "=&r" (tmpreg)
:
: "cbit", "memory");
#endif
return flags;
}
static inline void arch_local_irq_restore(unsigned long flags)
{
asm volatile("mvtc %0,psw"
:
: "r" (flags)
: "cbit", "memory");
}
static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
return !(flags & 0x40);
}
static inline bool arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
#endif /* _ASM_M32R_IRQFLAGS_H */
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